PERTHSHIRE, SCOTLAND—While repairing a field wall on a hillside, volunteers with the Scottish Wildlife Trust discovered a stone in the wall that was shaped like a shallow basin. It may be half of a 6,000-year-old quern stone, used by Neolithic people to grind grain into flour. Roundhouses, rock art, and burial mounds have also been found in the area, known as Balnaguard Glen. “We are more than happy to give it a home in the museum, after clearance with Scottish Treasure Trove,” said Mark Mall of the Perth Museum and Art Gallery.